95C9012USA s/n . . . . so it's custom, alright.
Set neck, MXY pickups with I'm guessing Vol-Pan-Bass cut/boost-Treble cut-boost (as I don't see any Q-switches), Zebrawood(?) over mahogany body, maple neck with cone peghead, 'A' Gotoh keys. As usual, I'm doubting the fingerboard has NOT been oiled (what are the 'splits' in the fingerboard?) and the brass needs cleaning. Inside looks untouched. Some handling wear.
Not sure of the body shape.
I'd agree with Mike that of course the best way would be to sell the TBird first, there's always some schnook that salivates as soon as they hear 'vintage Gibson', and a Bicentennial TBird would fit that bill, especially in mint shape. Amazing the mileage they got out of a bespoke pickguard on those neck-heavy beasts.
On the other hand, if you're playing fives exclusively, a set-neck Alembic would be a step up. Sure a neck through is preferred, but their set-necks are nothing to sneeze at either, as they're still Alembics, and more importantly have Ron's electronics in them , the real heart of the matter.
These Doulbe D guys are showing over 3,000 sales at 100%, so I doubt that would be a problem, though I'm no fan of EBay.
The really important question though is what are you after in a new (to you) instrument. This is probably a bit bigger and heavier instrument than the TBird. Soundwise, they would be somewhat similar as I don't remember any thick/bassy sounding TBirds. Does the fingerboard width look like what you're used to? What kind of bass tone do you like on recordings? Are you fingerstyle, a slapper, a pick guy, play in church, or those places your momma warned you about? Amps ? ? ?
And as much as I truly love these things and the people that build them, they are not everybody's cup of tea. You will hear things you've never heard before in your playing: They are brilliantly neutral-sounding, and some people are not up for it. Live with one, though, and it WILL make you a better player. It's like going from a spinet to a 6' grand: It's all RIGHT HERE, in your face. Some people will miss the Fender with the dead strings pretty quick . . . In my case, over time, I've let all my other axes go, nothing compares. But we have lots of guys here that own plenty other basses as well.
We can help you answer these questions, but you could help us out filling in the blanks as to what you're after. There's lots of other fives out there. If you REALLY want a neckthru Alembic, they come along form time to time, 'there will be another', so you could sit this one out.
Is this an EVEN swap? If so, I'd imagine he's in a fairly typical case of 'I can sell a Gibson, I don't know WHAT to do with THIS thing!'.
I'd also go to the 'Serial Number' post in the 'Owning an Alembic' section of the club, and Mica can supply the particulars in a couple of days.
I played piano for a lot of years. All good piano techs have SERIOUS ears, and I KNOW you'd hear the difference. We just need a little more info to tell whether you're a Baldwin guy or a Steinway guy !
Good Luck,
J o e y